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What are the causes of urinary tract infections in late pregnancy?

Mar 18, 2025 Source: Cainiu Health
Dr. Cao Zhiqiang
Introduction
Urinary tract infections in late pregnancy are often caused by factors such as poor hygiene, weakened immunity, vulvitis, bacterial vaginitis, and gestational diabetes. These factors may increase the likelihood of bacterial or other pathogenic infections, thereby affecting the urinary tract and causing discomfort. Timely, cause-specific treatment according to the underlying causes and associated symptoms is necessary, but should be conducted under a doctor's guidance.

Generally, urinary tract infections (UTIs) in the late stages of pregnancy are commonly associated with factors such as poor hygiene, low immunity, vulvitis, bacterial vaginosis, and gestational diabetes. If symptoms are severe, medical treatment is recommended. Detailed analysis is as follows:

1. Poor Hygiene

Failure to maintain personal hygiene in the late stages of pregnancy and not drying promptly after urination may lead to bacterial growth and subsequent urinary tract infections. These can be alleviated by regularly washing with warm water and frequently changing underwear.

2. Low Immunity

Individuals with weakened immune systems are more susceptible to external stimuli and face a higher risk of developing urinary tract infections. Immunity can be improved through moderate walking and a balanced diet, thereby reducing the likelihood of infection.

3. Vulvitis

Vulvitis is caused by bacterial or viral infections. If not treated promptly, pathogens may enter other areas, including the urethra, leading to urinary tract infections. Symptoms typically include redness and pain in the vulva. Keeping the affected area dry is essential, followed by using medications such as erythromycin ointment, clotrimazole cream, or metronidazole gel as directed by a physician.

4. Bacterial Vaginosis

Bacterial vaginosis occurs due to imbalance in the vaginal flora, allowing bacterial invasion. Once pathogens enter the urethra, they can cause localized inflammatory reactions. Symptoms may also include vaginal redness and burning sensations. Maintaining good local hygiene is important, and treatment should follow medical advice regarding the use of medications such as metronidazole vaginal suppositories, clindamycin phosphate vaginal gel, or tinidazole suppositories.

5. Gestational Diabetes

Gestational diabetes is typically associated with genetic factors, improper diet, and other similar causes. Persistently elevated blood glucose levels may indirectly trigger urinary tract infections, accompanied by symptoms such as hunger and thirst. Appropriate exercise combined with medication, such as recombinant human insulin injection, metformin hydrochloride tablets, or glibenclamide tablets as advised by a doctor, is recommended.

Women suffering from urinary tract infections in late pregnancy should seek medical guidance for treatment to avoid self-medication, which may harm the fetus. Additionally, maintaining a positive mindset and undergoing regular prenatal checkups are necessary during treatment.

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